GB9220584D0 - Data security arrangements for semiconductor programmable logic devices - Google Patents

Data security arrangements for semiconductor programmable logic devices

Info

Publication number
GB9220584D0
GB9220584D0 GB929220584A GB9220584A GB9220584D0 GB 9220584 D0 GB9220584 D0 GB 9220584D0 GB 929220584 A GB929220584 A GB 929220584A GB 9220584 A GB9220584 A GB 9220584A GB 9220584 D0 GB9220584 D0 GB 9220584D0
Authority
GB
United Kingdom
Prior art keywords
programmable logic
logic devices
data security
security arrangements
semiconductor programmable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB929220584A
Other versions
GB2260431A (en
GB2260431B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pilkington Micro Electronics Ltd
Original Assignee
Pilkington Micro Electronics Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB919121591A external-priority patent/GB9121591D0/en
Application filed by Pilkington Micro Electronics Ltd filed Critical Pilkington Micro Electronics Ltd
Priority to GB9220584A priority Critical patent/GB2260431B/en
Publication of GB9220584D0 publication Critical patent/GB9220584D0/en
Publication of GB2260431A publication Critical patent/GB2260431A/en
Application granted granted Critical
Publication of GB2260431B publication Critical patent/GB2260431B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C16/00—Erasable programmable read-only memories
    • G11C16/02—Erasable programmable read-only memories electrically programmable
    • G11C16/06—Auxiliary circuits, e.g. for writing into memory
    • G11C16/22—Safety or protection circuits preventing unauthorised or accidental access to memory cells
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/14—Protection against unauthorised use of memory or access to memory
    • G06F12/1408—Protection against unauthorised use of memory or access to memory by using cryptography
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
    • G11C7/24—Memory cell safety or protection circuits, e.g. arrangements for preventing inadvertent reading or writing; Status cells; Test cells
GB9220584A 1991-10-11 1992-09-30 Data security arrangements for semiconductor programmable logic devices Expired - Fee Related GB2260431B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9220584A GB2260431B (en) 1991-10-11 1992-09-30 Data security arrangements for semiconductor programmable logic devices

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB919121591A GB9121591D0 (en) 1991-10-11 1991-10-11 Data security arrangement for semiconductor programmable logic devices
GB9220584A GB2260431B (en) 1991-10-11 1992-09-30 Data security arrangements for semiconductor programmable logic devices

Publications (3)

Publication Number Publication Date
GB9220584D0 true GB9220584D0 (en) 1992-11-11
GB2260431A GB2260431A (en) 1993-04-14
GB2260431B GB2260431B (en) 1995-06-14

Family

ID=26299678

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9220584A Expired - Fee Related GB2260431B (en) 1991-10-11 1992-09-30 Data security arrangements for semiconductor programmable logic devices

Country Status (1)

Country Link
GB (1) GB2260431B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8051303B2 (en) * 2002-06-10 2011-11-01 Hewlett-Packard Development Company, L.P. Secure read and write access to configuration registers in computer devices

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114522A3 (en) * 1982-12-27 1986-12-30 Synertek Inc. Rom protection device
US4698617A (en) * 1984-05-22 1987-10-06 American Microsystems, Inc. ROM Protection scheme
US5007082A (en) * 1988-08-03 1991-04-09 Kelly Services, Inc. Computer software encryption apparatus

Also Published As

Publication number Publication date
GB2260431A (en) 1993-04-14
GB2260431B (en) 1995-06-14

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20010930